I realise this is a Wii fit gals thread, but thought I would answer a few of the questions.

We bought one on Friday and I am very sore this morning.

My wife is 6 weeks pregnant so I was researching whether there were any issues with any of the activities?

To answer your queries:
- Boxing is part of Wii Sport (which comes with every Wii console) it is in there with Bowling, tennis, baseball etc. Havent seen it as yet in Wii Fit. So you dont need the Wii fit to do this one.
- Prices: current prices are around $399 for console, 1 controller and Wii sport. JB Hifi has it for $388. I bought a bundle from Target which was $429 and contained an extra game (beach sports) and a bunch of 8 controller add ons eg steering wheel, tennis raquet etc. Bought the Wii Fit from JB Hifi as it was $149 (best price i saw at most chains) but came with a cool rechargeable battery pack. EB games do price match, but because of the supply shortage, if you see a good price grab it!!

Really great fun and great excercise. Hula really works up a sweat and boxing kills your back and shoulder muscles.